MN3310 Evaluation Kit v1 User Guide

Transcription

1 1 Evaluation Kit Introduction The MN3310 Evaluation Kit is designed to allow the user to quickly evaluate the Micro Modular Technologies MN3310 GPS receiver module. The evaluation kit can be used in either a laboratory or a mobile environment. The evaluation kit implements the necessary circuitry to attach an MN3310 GPS receiver module to a PC-compatible computer. In addition, the evaluation kit provides the necessary power for the supplied active antenna. The MN3310 evaluation kit software is supplied on a CD ROM. This software is installed onto a PCcompatible computer. This software allows the user to control the MN3310 GPS receiver module as well as display and record the receiver output message data. 1.1 Document Applicability This document applies to the MN3310 Evaluation Kit (MN3310-EVK1). 1.2 Kit Identification The MN3310 Evaluation Kit can be identified as follows: An MN3310 module is located between the battery holder and the Port 0 serial connector. 2 Description of the Evaluation Kit The MN3310 Evaluation Kit features dual RS-232D level translation from the 3-volt logic levels utilized by the MN3310 GPS Receiver module to the RS-232D levels typically used for serial data communications with the PC-compatible computer. In addition, the MN3310 Receiver module includes an active antenna power supply to provide power to an external active antenna. Switching power supplies were chosen for the main power supplies to improve the battery life of the internal battery pack. Also, switching power supplies more closely represent power supplies that would most likely be chosen by the OEM. The MN3310 module includes a Real Time Clock chip onboard which is supplied with 3V backup power even when the main power switch is turned off. This provides the MN3310 receiver with precise time which allows the receiver to execute a hot start (assuming that ephemeris and position data is current). The user can therefore evaluate the Hot Start capability of the MN Supplied Equipment The MN3310 Evaluation Kit contains the following items: 1. MN3310 GPS receiver module installed onto an the evaluation board which includes RS-232 level translators, power supplies and switches. 2. MN3310 Evaluation Kit CD which contains the following: a. MMT Evaluation Software for operation of the MN3310 Evaluation Kit b. Documentation for the MN3310 Evaluation Kit in PDF format. 3. Serial Cable 4. Four AA Batteries Micro Modular Technologies Pte. Ltd. Page 1 of 7

2 5. Active Patch Antenna 2.2 Additional Required Equipment The MN3310 Evaluation Kit requires the following customer-supplied items at a minimum for testing the MN3310 GPS receiver module: 1. PC-compatible desktop or laptop (preferred) equipped with the Windows XP operating system, one available serial port and a CD ROM drive. 2.3 Detailed Interfaces Description Indicator Lights Three indicator lights are provided on the faceplate to provide summary status of the MN3310 evaluation board Serial Port 0 The leftmost light is the PWR light, which illuminates when DC power is switched on. The middle light is the DATA light, which flashes to indicate the MN3310 evaluation board is sending RS-232 data to the host computer on Port 0. The rightmost light is the 1PPS light, which flashes at a 1 Hz rate driven by the 1PPS signal from the MN3310 GPS Receiver module when the receiver has a fix. Serial Port 0 is the primary serial port for communications between the MN3310 evaluation board and the PC-compatible computer. When viewed from the front (switch and LED end), serial port 0 is on the right side of the board. Communications on this port are in National Marine Electronics Association (NMEA- 0183) format for both data and configuration messages. The pin configuration for serial port 0 is defined in Table 1. The signal levels are defined in EIA-RS-232D. Pin Number Function Signal Direction 2 Tx Data From MN3310 to computer 3 Rx Data From computer to MN Signal Return Connect to DC return Table 1 RS-232 Pin Assignments Micro Modular Technologies Pte. Ltd. Page 2 of 7

3 2.3.3 Serial Port 1 Serial Port 1 is the secondary port for communications between the MN3310 evaluation board and the PC-compatible computer. This port can be used for binary communications protocol. The pin assignment and signal levels are the same as shown for serial port Antenna connector The antenna connector provides the L1 GPS signal from an antenna into the MN3310 evaluation board. Both active and passive antennas are supported and the evaluation kit includes an active antenna. If a directly connected 3-volt active antenna is not going to be used, the antenna supply voltage should be disabled. Section describes removal of the shunt on jumper J5 to disable this supply voltage Power Switch The leftmost switch on the face of the MN3310 evaluation kit is the power switch which controls power to the evaluation board. If the switch is in the lower position, the power is turned off to the evaluation kit. Note that the switch does not interrupt the DC power, but places the on-board power supply into shutdown mode. Therefore, there is a very small amount of leakage current drawn from the DC power source Serial Boot Switch The middle switch controls serial boot and is used to reprogram the flash memory on board the MN3310 GPS Receiver module. For normal operation with program execution from flash, this switch should be in the up position. The position of this switch is only read during power-up or reset of the MN3310 GPS Receiver module. Changing the switch position at other times has no affect on the operation of the receiver Reset Button The rightmost switch, a reset button, issues a hardware reset command to the MN3310 GPS Receiver module. This button is used during programming, or whenever the user desires to issue a hardware reset to the MN3310 module. 3 Configuring the Evaluation Kit As shipped, the MN3310 Evaluation Kit is useable without having to reconfigure internal options. The default configuration applies 3 volts DC superimposed upon the RF antenna connection to supply power to the included active antenna. If passive antenna operation (see precautionary note below) is desired, the user can remove the shunt on J Jumpers J4 jumper block on the MN3310 evaluation board is provided to allow the insertion of a DC current meter to measure the DC current being supplied to the MN3310. During normal operation a shunt should be connected across the two pins of this block. Micro Modular Technologies Pte. Ltd. Page 3 of 7

4 3.1.2 Battery Pack J5 jumper block on the MN3310 evaluation board is provided to supply +3 volts for an active antenna. If using a passive antenna, antenna distribution system, or an antenna powered in some other fashion, then remove the shunt across J5 to prevent possible damage to the MN3310 evaluation board. The battery pack allows for the installation of four AA-size batteries. Battery orientation is molded into the plastic case. The battery pack can provide power for up to approximately 75 hours before the batteries are exhausted. If the MN3310 evaluation kit is not to be used for more than two weeks, remove the batteries to avoid the possibility of electrolyte leakage. Although rechargeable batteries may be used in the battery pack, the evaluation board provides no means to recharge the batteries. In addition, rechargeable batteries will have a shorter life than standard alkaline cell batteries. The MN3310 evaluation board contains protection diodes to prevent damage in case the batteries are inserted incorrectly. 4 Initial Checkout of the MN3310 Evaluation Kit Follow this procedure to initially check out the proper operation of the software and MN3310 Evaluation Kit hardware. 1. Install four AA batteries into the MN3310 evaluation board battery pack. 2. Turn on the power switch on the MN3310 evaluation board and verify the power LED glows green. If the LED does not glow green, make sure shunt J5 is installed. 3. Turn off the power switch. 4. Connect the supplied serial cable from Port 0 of the MN3310 evaluation board to the serial port of the host PC. 5. Connect the active antenna to the RF connector on the MN3310 evaluation board. 6. Place the active antenna where it has a clear and unobstructed view of the open sky. 7. Start up the MN3310 evaluation program on the host computer. 8. Turn on the power switch of the MN3310 evaluation board. 9. The MN3310 evaluation program should indicate communication with the MN3310 evaluation board, and after a short delay of a minute or so display current time and position. 10. Allow the receiver to operate for approximately 15 minutes to collect current almanac data from the GPS satellites. Micro Modular Technologies Pte. Ltd. Page 4 of 7

5 5 Evaluation Board Layout Figure 1 MN3310 v1 Evaluation Board Layout Micro Modular Technologies Pte. Ltd. Page 5 of 7

6 6 Evaluation Board Schematic Figure 2 MN3310 v1 Schematic Micro Modular Technologies Pte. Ltd. Page 6 of 7

7 7 Notices All reference and informational documents (including marketing information, specifications, reference designs, etc.) are provided for information only and are subject to change without notice. Reasonable efforts have been made in the preparation of these document to assure their accuracy, however Micro Modular Technologies Pte. Ltd. assumes no liability resulting from errors or omissions in these, or any document, or from the use of the information contained herein. Micro Modular Technologies Pte. Ltd. reserves the right to make changes in the product design and specifications as needed and without notification to its users. Please check our website for the most current documentation. All information contained herein is the property of Micro Modular Technologies Pte Ltd. and may not be copied or reproduced, other than for your information, without prior written consent. 8 Contact Information Corporate Headquarters Micro Modular Technologies Pte. Ltd. No. 3, Ubi Avenue 3, #03-02 Crocodile House, Singapore Tel: (65) Fax: (65) sales@micro-modular.com Americas and Europe Micro Modular Technologies Americas Creekside Lane Longmont, CO 80503, U.S.A. Tel: (1) Fax: (1) sales@micro-modular.com Korea Office Micro Modular Technologies Korea 4th Fl, Pyung-ik Bldg, Youngtong-Dong, Paldal-Gu, Suwon-City, Kyunggi-Do, Korea For a list of Regional Sales Representatives, please see our web page: Tel : (82) sales@micro-modular.com Document no: MN3310-EVK1_UG_ Micro Modular Technologies Pte. Ltd. Page 7 of 7